Flanged hose



Oct. 13, 1942.

FLANGEDv HOSE 4 Filed Aug. 3, 1940 D. E. yHARPFi-:R f

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Patented oa. 13,1942'r oFFIc EJ n M l s rmNGEnno'sEf l Donald E; Harpfer, lnon', Ohio,` assigner (to:

Wingfootf Corporation; Wilmington, DeL', a .corf

porationrot `Delaware i f Application August-3; 1940.` serial No. 350;.432

\ I Ya, claimant-(vol. `28sni This invention` relates to high-pressure hose lmadeof rubberv and fabric, and particularly tothe construction 4of :the endstof suchhose which are to be connectedxtolanother hose orconduit orthe` like.

One objectioffthislinvention is to provide in a` hoseof this character;L alcoupling which willnot break down underthevhigh pressures used insuch` s hose, andwhich willnot cause alessening of the f clampinggpressureafter the khose hasbeen coupled toanotherr hose,` whereby .toprevent leakage. y s Another object of thisinventionis'to provide a clamping flange offmetalor-'similar rigidmaterial which is preferably formedias an'integralpart of l the hose'v itself andis bonded thereto to .prevent spreading of the rubber whenwthe clamping pres-- sure is exerted on `the clamping` flange;

Another object tofrthis` invention :is to provide a split ringin thewflangedlend of the hose with al `bodyfofcushioning material between the sections thereof whereby when the clamping` pressure is exerted the ringrwill contract andthe ,cushioning material ,willexerta `forcerin a direction opposite to the clamping `,pressure to maintain a tight seal between the uhose sections.

Another object of-this invention isto provide.:

a reinforcing ring in the endof a. hosesection incrossesectionzand substantially annular in generalshape,` `isA split` substantially on. a diameter thereof to forrntwo sections indicated in Fig, 2y as sections A and B. Each section is provided with a pin I6 `threaded-into the splitring at l1,

'andthe end 'of each of `thesepins is rounded-so yas z to more readilyenterrabore I8. in theopposed end ofthe other section of the ring. The pin I6 slid- .r ing in the boreI8.-p`ermits kthe ring to contract or l0.v

`sections 4of the: ring a're'placed over'the end of 'Y the hoseandbrought together'with the pins Iiiv `expand withinthe limitsofthevpins I6'. The two` arranged withinthe'bores `I IIJ after thepreliminary steps ofibuilding; the hose previously described.

whichwill facilitate `the assembly of the `rington."

the hose duringthefmanufacture thereof.

`In the drawing:

Fig.-1` represents a longitudinalfragmentary'A cross-section through a hose embodyingrmyinvention; and

Fig. 2 Ais a' transverse cross-section takenalong the line 2--2 of Fig. 1.

In building a-hose vof thecharacter described,`

a tubular mandrel isused suchasfis commonly employed for this purpose. On the outer surface of this mandrel there is formedV axlayer of rubbery IU and'on topffof` thislthere is wound'alayer.` of rubberized fabric II, preferably-breaker stock.'l

On .top i of this4 layer I I is one ormore layers of fabric I2, preferably of cross-wovenfabric, and on this layer. is superimposed alternate layers Iof rubber AIl andlongitudinally extendingfwires I4.

Spirally wrapped,layers` of wire 251are usedcto hold the ends of the Vwires `I4 vin `placeiwith sutil-` cient rubber; aroundall of said wireslto fill the interstices therebetween.

All Vofltliisfls formedasastraight tubular piece In thismangner. a snug .fitA can be insured about the hoselsection vWitlioutfthenecessity of removing. the hose `sectionzfrom the mandrell andy withoutrequiringthe-ring to be `forced over the end of the mandrelV since `this latterrmethod is some' times inconvenient, due to the mandrel being supported atits` ends and, in the caseof a solid ringgthis latter operation is ratherflaborious in view-'ffthe. fact that if the. inner diameter of the solid ring is` madeto just t the outer surface of the hose it `cannot be readily slipped overvthe end of the hose without considerable pressure.

The rin-gis'wrapped-with gummed fabric or the like at least over the'fjoint `between theringsto prevent rubber from flowing into the spacey bes tweenA the rings, thus leaving a void 24 which permits the ringtoexpand andcontract; When the ring .is in place, the wiresal 3 and the fabric layers I0, II andy Ilareturned upwardly and over the ring, andtheriy back againstthesbody of the hose,

' as is clearlyillustrated in Fig. 1.

In order to finish'the outer surface of the hose,

I. can then placeLadditional layers of fabric I9 andrubber 2|i*to protectzthe outer surface of the hose.

Priorto assemblingthe hose in the manner set forth,- asolid annularclampingzring 21| is slipped overfthehose andwben the hose assembled, as

` has already 'been described, this rirfg is moved to of. stockrwith the wiresand fabric extending appreciably beyond the: end roffthe inner rubberlayer IIL Asplit ringISlis thereafter madeto encircle the hose so constructed,lnear the endthereof, as illustrated in Flg. 1. 'I'his ring which iscircular `the positionshowntinrFig. 1, preferably before the layer 20 isapplied; anda suiiicient Aquantity of rubber is placed aroundthe endL ofxthe hose, as at 22, to form the'resilient rubber end on the hoser during the `molding operation, which .is employed to bond'the layers of rubber, fabric and wire together and to. give the hose end its eventual shape. During this molding operation the ring 2| becomes bonded to the outerslayer of rubber or rubi berlzed fabric forming'the outer layer of the hose to prevent thecreeping of the rubber or vfabric outwardly or around the ring I5 when the clamping pressure is exerted thereon.

The wires Il ar.` braided wire, or if desired can be made of relatively stiff material and of such character as to be substantially inextensible, whereby after the hose is once formed and the clamping pressure is exerted on the hose the -wire and the adjacent layers of fabric and rubber will not tend to creep around the ring I5 to cause a destruction of the hose structure or a lessening of the clamping pressure. It must be borne in mind that, while there is a radial pressure on the sidewalls of the hose, this same pressure is exerted in a longitudinal direction and tends to lengthen the hose and to pull the enlarged end of the hose through the opening in the clamping ring 2|. It is, therefore, necessary to form the hose flange in such a manner as to make it practically impossible for the parts of the hose tochange their initial positions with respect to each other.

A round section is used for the ring I5 to permit of a gradual change in the angle of the wire Wrapped therearound, rather than to have a ring which islangular in cross-section, in which case the wire takes a bend and is thus weakened, Ob-

'viously, the ring need not be of circular crosssection to accomplish this result, as it could be made slightly oval or with the right-hand side thereof, as illustrated in Fig. 1, arcuate in form and with the other side thereof tapered or shaped so as not to interfere with the wires or fabric occupying the relative positions illustrated in the drawings.

When the clamping pressure is exerted on the hose in an endwisev direction by bolts passing through the bores 23 thereof, there is a radial force exerted on the ring I5, which tends to move the sections inwardly toward each other. This force is resisted by the rubber and fabric forming the body of the hose. Thus, even if the clamping pressure on the flange is lessened, as by loosening of the bolts, there is still a firm non-leaking connection formed for the reason that the ring is caused to expand outwardly and become slightly larger in diameter whereby the ends 22 of the hose are kept in firm engagement with each other.

Obviously, those skilled in the art to which this invention pertains may make various changes in the particular arrangement and construction of the hose without departing from the spirit of this invention and, therefore, I do not wish to be limited except as may be hereinafter set forth in the claims.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent oi.' the United States is:

1. A flanged end hose including a rubber and fabric body, a circumferentially split metal ring positioned adjacent the end of the body with the end of the body being cuied back over the ring, the ends of the ring normally being spaced apart by the resiliency of the body, and clamping means surrounding the body and engaging with the cufed back end thereof adjacent the ring and adapted to compress the body and move the ends of the ring towards each other during a clamping operation.

2. A hose comprising a' tubular body, a flange on said body extending outwardly therefrom, a transversely split reinforcing ring embedded in said anged end and covered on all sides by the material of said flange, said ring having intertting guide elements to guide the sections of said ring to and from each other and normally in spaced relation at their mating ends to leave a gap therebetween, and fabric encircling the opposed ends of said ring to restrict partially the ow of the surrounding flange material into the space between said ends.

3. A flanged end hose including a rubber and fabric body, a circumferentially split metal ring positioned adjacent the end of the body with the end of the body being cuffed back over the ring, the ends of the ring normally being resiliently and yieldably spaced apart, and an inextensible metal clamping means surrounding the body and engaging with the cuied back end thereof adjacent the ring and adapted to move the ends of the ring towards each other during a. clamping operation.

DONALD E. HARPFER. 

